Fatal error: Uncaught Error: Class "Symfony\Component\Form\AbstractType" not found in /home/jeanmichel.richer/public_html/ens/l3pro/symfony/tp9/vehicule_type.php:15 Stack trace: #0 {main} thrown in /home/jeanmichel.richer/public_html/ens/l3pro/symfony/tp9/vehicule_type.php on line 15